In order to check email address you can click on Check and Remove Bad Addresses From Job List button.
This will only check validity of email addresses on the job list and will not send any email to checked addresses.
Then, bad email addresses can be accessed from
{Multi-Email Sender Installation Folder}\faillist.txt
After this process, only valid email addresses will be visible on the job list. A copy of the valid email addresses list can be saved to the disk by clicking on Save Job List button. The file reside in installation folder and its file name is temp__Recipients.txt
